> For the complete documentation index, see [llms.txt](https://docs.tonic.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tonic.ai/app/generation/identify-sensitive-data.md).

# Identifying sensitive data

Tonic Structural uses its sensitivity scan to identify source data columns that contain sensitive information. The scan ignores truncated tables.

The sensitivity scan identifies Structural's built-in sensitivity types. It also looks for custom types that you define.

You can also manually mark a column as sensitive or not sensitive.

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Run the Structural sensitivity scan</strong></td><td>Run, configure, and get the results of the sensitivity scan.</td><td></td><td><a href="/app/generation/identify-sensitive-data/running-the-structural-sensitivity-scan.md">Running the Structural sensitivity scan</a></td></tr><tr><td><strong>Set column sensitivity manually</strong></td><td>Options to override the results of the sensitivity scan.</td><td></td><td><a href="/app/generation/identify-sensitive-data/sensitivity-set-manually.md">Manually indicating whether a column is sensitive</a></td></tr><tr><td><strong>Built-in sensitivity types</strong></td><td>Types of sensitive data that the sensitivity scan can identify.</td><td></td><td><a href="/app/generation/identify-sensitive-data/sensitivity-types-built-in.md">Built-in sensitivity types that Structural detects</a></td></tr><tr><td><strong>Configure custom sensitivity rules</strong></td><td>Set up rules to enable the scan to identify other sensitive columns based on the column data types and names.</td><td></td><td><a href="/app/generation/identify-sensitive-data/custom-sensitivity-rules.md">Creating and managing custom sensitivity rules</a></td></tr></tbody></table>


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